Barbarism likewise threatens when men cease to talk together according to reasonable laws. There are laws of argument, the observance of which is imperative if discourse is to be civilized. Argument ceases to be civil when it is dominated by passion and prejudice . . . when dialogue gives way to a series of monologues . . . when the parties to the conversation cease to listen to one another, or hear only what they want to hear, or see the other's argument only through the screen of their own categories; when defiance is flung to the basic ontological principle of all ordered discourse, which asserts that Reality is an analogical structure, within which there are variant modes of reality, to each of which there corresponds a distinctive method of thought that imposes on argument its own special rules. When things like this happen, men cannot be locked together in argument. Conversation becomes merely quarrelsome or querulous. Civility dies with the death of the dialogue.